The high power polarization insensitive circulator (polarization-idependent fiber optical circulator) is a nonreciprocal, passive 3-port device, and its key functionality is directing light signals sequentially from one port to the next sequential port which results in the separation of signals which travel along an optical fiber in opposite directions. The routing characteristics can be represented by 1 → 2, 2 → 3, i.e. port 1 is an input port only, ports 2 serve as input and output ports while port 3 is an output-only port. Lfiber can customize the high power polarization insensitive circulator according to the customers’ ordering information (at the last part of the spec sheet). Related Products

High power Polarization Insensitive Circulator (Polarization-idependent Fiber Optical Circulator)

Fiber optical circulators are made of an assembly of optical components. There are many different designs but the key operation principle is based on the Faraday effect, like that of the isolator.
 
Lfiber’s high power polarization insensitive circulator (polarization-idependent fiber optical circulator) is functional independent of the polarization state of a light. It is known that the state of polarization of a light is not maintained and varies during the propagation in a standard optical fiber due to the birefringence caused by the imperfection of the fiber. Therefore, the majority of fiber optical circulators used in fiber optic communication systems are designed for polarization-independent operation. 

Applications of Optical Circulators

Optical circulators were originally used in telecommunication systems for increasing transmission capacity of existing networks. By using optical circulators in a bi-directional transmission system, the transmission capacity of the network can be easily doubled without the need for deploying additional fibers, which has become increasingly expensive. However, with the rapid advancement in optical communication technologies and the ready availability of low-cost and high-performance circulators, the applications of optical circulators have drastically expanded into not only the telecommunication industries but also the sensing and imaging fields. Optical circulators have become an especially important element in advanced optical networks such as DWDM networks.

 

High Power Polarization Insensitive Circulator

 

FEATURES OF HIGH POWER POLARIZATION INSENSITIVE CIRCULATOR

  • High Isolation & High Return Loss
  • Low Insertion Loss & PDL
  • Optical Path Epoxy Free

APPLICATIONS OF HIGH POWER POLARIZATION INSENSITIVE CIRCULATOR

  • EDFA, DWDM, and OTOR
  • DWDM and OADM networks
  • Bi-directional Transmission System

 

Specifications of High Power Polarization Insensitive Circulator
Operating Wavelength (nm)1550±30C+L Band (1570±50)
Peak Isolation @23 ℃ (dB)≥40≥40
Isolation @23 ℃ (dB)≥35≥30
Insertion Loss @23 ℃ (dB)≤1.0≤1.0
PDL (dB)≤0.15≤0.20
Return Loss (dB)≥50
PMD (ps)≤0.1
Directivity (dB)≥50
Power Handling (W)1, 2, 3, 5; Others on request
Fiber TypeSMF-28e
Operating Temperature ( ℃ )0 to +70
Storage Temperature ( ℃ )-40 to +85
Package Dimensions (mm)For Φ250μm bare fiber or Φ900μm loose tubeΦ5.5 × 50 (< 5W)
58 x 10 x 8 mm (>5W)
For Φ3mm or Φ2mm cable90 × 20 × 9.5 mm

Notes:

  • The high power polarization insensitive circulator is customizable and the above specifications are subject to change without notice.
  • For device with connectors, IL is 0.3dB higher, RL is 5.0dB lower.
  • Bare fiber should not support the weight of the connector. So that if any connectors needed, for the pigtail type it’s better to choose the 900μm loose tube jacket instead of the 250μm bare fiber.
  • For CW high-power optical interconnection, we recommend fusion splice without connectors.
  • For product customization or special requirements, please contact Lfiber’s sales department for availability.

 

Package Dimensions & Routing Characteristics

High Power Polarization Insensitive Optical Circulator

 

Routing: Port 1 → Port 2, Port 2 → Port 3

 

Ordering Information for High Power Polarization Insensitive Circulator
Center WavelengthPort TypePowerPackage DimensionsPigtail TypeFiber LengthConnector
1550nm3-Port1WΦ5.5×50 mmΦ250μm bare fiber0.5mNone
1570nm2W58×10×8 mmΦ900μm loose tube0.8mFC/UPC
3W90×20×9.5 mmΦ2mm cable 1.0mFC/APC
5WΦ3mm cable1.5mSC/APC
Custom …2.0mSC/UPC
Custom …MU
LC/PC
LC/APC
E2000 APC
E2000 PC
ST/PC